Marvin is a rather tall man with chestnut mid-length hair that cover his right eye and a short ponytail. He is typically seen smoking the cigarette. He had sideburns and a very thin moustache.
Marvin seems to be of the taciturn type.
Originally from the South America Branch, he was promoted and transfered to the European Branch.
Destruction of the Black Order Attempt arc Edit
Marvin is seen witnessing the ravages of Komurin. When Lenalee finally defeats it, he encourages her and he welcomes back Allen when he awakes with the others.
Suman Dark's fall Arc Edit
Marvin is seen with his coworkers when they talk with Komui about Suman's case. He doesn't say a word when Johnny talks about his relationship with Suman.
The Vampire of the old Castle Arc
Marvin has a dubitative look when Komui talks about finders who were the prey of the vampire.
Order in Crisis Arc Edit
He is seen with a shocked face aknowledging the death of the many black order members. He follows his section chief regarding his attitude towards their fallen comrades.
Edo and Asian Branch arc Edit
Noah's ark arc Edit
Marvin is present with everyone to welcome back the exorcists after they escape the ark. 
Invasion of the Black Order Arc Edit
Marvin is present in the room when Lulubell attacks. He manages to escape and to hide Reever, Rob Neal and a few other members. He is seen safe after the battle against the level 3. He is then wounded at the birth of the level 4 . He is revealed to have been protected by general Tiedoll once the level 4 is destroyed.